Magic Items

This steel shield is embossed with a longsword wrapped in thorny vines which end in roses in full bloom. The enamel voloring the roses is still vibrant.
While holding this shield, you have advantage on saving throws against spells and other magical effects, and spell attacks have disadvantage against you.

Wondrous Item, Legendary
While wearing this belt, your Strength score
changes to a score granted by the belt (29). If your
Strength is already equal to or greater than the belt's
score, the item has no effect on you.
Six varieties of this belt exist, corresponding with
and having rarity according to the six kinds of true
giants. The belt of stone giant strength and the belt of
frost giant strength look different, but they have the
same effect.
The storm giant quintessent Dessa imbued this belt
with her elemental strength. When the belt’s fantastic
strength is used lightning dances around the wearer
while a warm desert wind blows in the area.
This item can be found in the Dungeon Masters Guide

Wondrous Item, Legendary - MAGIC TABLE I

While not a truly intelligent item, the Eye of Xxiphu bestows terrifying insight into the true nature of the nightmarish aboleths. The attuned possessor of the Eye gains telepathy out to a range of 120 feet, and may cover themselves in a coat of mucous that allows them to breathe underwater as well as on land. The petrified orb is large and heavy, but does not need to be held in order to use its powers. Additionally, aboleths have disadvantage when attack the owner of the Eye and the owner has advantage on ability checks in regards to knowledge-based ability checks about aboleths and the Far Realm when they are not in combat.

This thick tome contains pages of thin, hammered
copper and has thing covers of slate. It is held shut
by a severed elven tongue. Occasionally, the attuned
user of this spellbook finds messages that have been
scrawled by someone claiming to be Netherese; this
ghostly writer refers to itself simply as “the warlock”
and frequently opines on the power of the one true
god of magic: Mystryl.
This item can be found in the Dungeon Master’s
Guide.

Wondrous item, legendary (requires attunement by a creature that has proficiency in the Arcana skill)

The black crystal tablet is a legendary magic item that requires attunement by a creature that has proficiency in the Arcana skill. Any creature that attunes to the tablet must make a DC 20 Wisdom saving throw at the end of its next long rest. On a failed save, the creature becomes afflicted with a random form of long-term madness.

As an action, a creature attuned to the black crystal tablet can use it to cast eyebite or gate (the portal created by this spell links to the Far Realm only). After the tablet is used to cast a spell, it cannot be used again until the next dawn.